The piezoelectric response of nanotwinned BaTiO3
Jazyk angličtina Země Anglie, Velká Británie Médium print-electronic
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
19417537
DOI
10.1088/0957-4484/20/10/105709
PII: S0957-4484(09)96745-9
Knihovny.cz E-zdroje
- MeSH
- chemické modely * MeSH
- elektrická vodivost MeSH
- nanostruktury chemie ultrastruktura MeSH
- nanotechnologie metody MeSH
- počítačová simulace MeSH
- sloučeniny barya chemie MeSH
- titan chemie MeSH
- vibrace MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- barium titanate(IV) MeSH Prohlížeč
- sloučeniny barya MeSH
- titan MeSH
The piezoelectric properties of tetragonal BaTiO(3) crystals with a very high density of 90 degrees twin domain boundaries are analyzed in the framework of the Ginzburg-Landau-Devonshire theory. Computer simulations predict a considerable enhancement of piezoelectric coefficients for domain thicknesses below 50 nm. This enhancement is much larger than the effect of the domain wall broadening mechanism of Rao and Wang (2007 Appl. Phys. Lett. 90 041915), but it is still a too weak effect to explain the domain density enhancement observed in the experiments of Wada and Tsurumi (2004 Br. Ceram. Trans. 103 93). The phenomenon observed here should nevertheless manifest in materials with nanoscopic domains, such as relaxor ferroelectrics and artificial ferroelectric nanostructures.
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